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Effect of latent heat on frost penetration in moist soil

Description: Substantial differences have been found between measured and computed heat losses from a large in-ground thermal storage tank used for annual cycle heat storage. One suspected source of error in the computation was the neglect of the latent heat effects in the moist soil and efforts have been made to examine these. One of these effects, that was due to freezing and thawing of the soil moisture is discussed, and the results of some simulations of the effect in a numerical model are presented.
Date: May 1, 1979
Creator: Hopper, F. C. & McClenahan, J. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Performance evaluation of a selected three-ton air-to-air heat pump in the heating mode

Description: An air-to-air split system residential heat pump of nominal three-ton capacity was instrumented and tested in the heating mode under laboratory conditions. This was the second of a planned series of experiments to obtain a data base of system and component performance for heat pumps. The system was evaluated under both steady-state and frosting-defrosting conditions; sensitivity of the system performance to variations in the refrigerant charge was measured. From the steady-state tests, the heat… more
Date: January 1, 1980
Creator: Domingorena, A.A. & Ball, S.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of a high efficiency, automatic defrosting refrigerator/freezer. Phase I. Design and development. Volume 1. Executive summary. Final report

Description: Eighteen energy-saving design options were identified for the automatic defrost refrigerator/freezer unit. Projected energy savings and likely consumer acceptance of the design options were evaluated and seven promising options were selected for the development phase. Computer and laboratory studies of an improved condenser and evaporator design, new air flow path and fan housing design, improved defrost and refrigeration expansion valve control, and optimized cabinet insulation were performed.… more
Date: February 1, 1980
Creator: Lee, W. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Martin Frost]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: December 1, 1979, 10:00 p.m.
Duration: 1 minute 19 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Evaluation and refinement of sprinkler application rate models used in frost protection

Description: Two models of the sprinkled orchard which predict the application rates required for successful frost protection were evaluated. A Sprinkling Application Rate (SPAR79) model, used the heat budget approach to determine the rate of heat lost by the plant part through radiative, convective, and latent heat transfer processes at the actual plant part temperature and at the plant part's critical temperature. The difference between these two rates of heat loss is the rate at which heat must be added … more
Date: January 1, 1979
Creator: Perry, K.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Korea folo]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: September 1, 1983, 10:00 p.m.
Duration: 1 minute 57 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Introduction to Building Systems Performance: Houses That Work II; Period of Performance: January 2003--December 2003

Description: Buildings should be suited to their environments. Design and construction must be responsive to varying seismic risks, wind loads, and snow loads, as well as soil conditions, frost depth, orientation, and solar radiation. In addition, building envelopes and mechanical systems should be designed for a specific hygro-thermal regions, rain exposure, and interior climate. The Building Science Consortium (BSC) design recommendations are based on the hygro-thermal regions with reference to the annual… more
Date: April 1, 2004
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Frost]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This Story aired at 6 pm.
Date: December 1, 1986
Duration: 59 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Growth of C02 frost thickness near Chasma Borealis during northern winter and spring.

Description: Epithermal neutron fluxes measured using the Neutron Spectrometer component of the Mars OdysscNGamma-Ray Spectrometer suite of instruments were studied to determ i ne the spatial and temporal dependence of CO2 frost cover of the nor t h polar cap for L, between 329 and 99 arcoccntric longitude. This time period spans the la t e northern xvinter through summer solstice . In the absence of a CO, cuvcr, the entire basement terrain p o l eward of about +55 latitude is vm, rich in I1 :0 . The conseq… more
Date: January 1, 2003
Creator: Feldman, W. C. (William C.); Boynton, W. V. (William V.); Prettyman, T. H. (Thomas H.); Kelly, N. & Maurice, S. (Sylvestre)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Helicity Asymmetry in gamma p -> pi+ n with FROST

Description: The main objective of the FROST experiment at Jefferson Lab is the study of baryon resonances. The polarization observable E for the reaction gamma p to pi+n has been measured as part of this program. A circularly polarized tagged photon beam with energies from 0.35 to 2.35 GeV was incident on a longitudinally polarized frozen-spin butanol target. The final-state pions were detected with the CEBAF Large Acceptance Spectrometer. Preliminary polarization data agree fairly well with present SAID a… more
Date: April 1, 2012
Creator: Strauch, Steffen
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Precision moisture generation and measurement.

Description: In many industrial processes, gaseous moisture is undesirable as it can lead to metal corrosion, polymer degradation, and other materials aging processes. However, generating and measuring precise moisture concentrations is challenging due to the need to cover a broad concentration range (parts-per-billion to percent) and the affinity of moisture to a wide range surfaces and materials. This document will discuss the techniques employed by the Mass Spectrometry Laboratory of the Materials Reliab… more
Date: March 1, 2010
Creator: Thornberg, Steven Michael; White, Michael I. & Irwin, Adriane Nadine
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Woody energy crops in the southeastern United States: Two centuries of practitioner experience.

Description: Forest industry experts were consulted on the potential for hardwood tree species to serve as feedstock for bioenergy in the southeastern United States. Hardwoods are of interest for bioenergy because of desirable physical qualities, genetic research advances, and growth potential. Yet little data is available regarding potential productivity and costs. This paper describes required operations and provides a realistic estimate of the costs of producing bioenergy feedstock based on commercial ex… more
Date: July 1, 2010
Creator: Kline, Keith, L. & Coleman, Mark, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Seasonal variation in carbon dioxide exchange over a Mediterranean annual grassland in California

Description: Understanding how environmental variables affect the processes that regulate the carbon flux over grassland is critical for large-scale modeling research, since grasslands comprise almost one-third of the earth's natural vegetation. To address this issue, fluxes of CO{sub 2} (F{sub c}, flux toward the surface is negative) were measured over a Mediterranean, annual grassland in California, USA for 2 years with the eddy covariance method. To interpret the biotic and abiotic factors that modulate … more
Date: May 1, 2004
Creator: Xu, L & Baldocchi, D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

EHD enhancement of boiling/condensation, heat transfer of alternate refrigerants. Final Report for 1993-1999

Description: The goal was to address the feasibility of frost control by the EHD technique for operating conditions and geometries of significance to refrigeration. The objective of the experimental investigation was to demonstrate by experiment the feasibility of the EHD technique for control of frost on a cold surface under operating conditions of direct significance to refrigeration applications.
Date: September 1, 1999
Creator: Ohadi, M. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance evaluation of a low-first-cost, three-ton, air-to-air heat pump in the heating mode

Description: A low-cost, air-to-air, split-system residential heat pump of nominal 3-ton capacity was instrumented and tested in the heating mode under laboratory conditions. This was the first of a planned series of experiments, the objective of which is to assemble a detailed data base of system and component performance for heat pumps. The system was tested under both steady-state and frosting-defrosting conditions. From the steady-state tests, the heating capacity and coefficient of performance were det… more
Date: October 1, 1978
Creator: Domingorena, A.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Police shootings]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: February 1, 1984, 6:00 p.m.
Duration: 1 minute 50 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Shooting vigil]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: February 1, 1984, 10:00 p.m.
Duration: 1 minute 41 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: IRTA]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: July 1, 1982, 6:00 p.m.
Duration: 1 minute 29 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

HTS power lead testing at the Fermilab magnet test facility

Description: The Fermilab Magnet Test Facility has tested high-temperature superconductor (HTS) power leads for cryogenic feed boxes to be placed at the Large Hadron Collider (LHC) interaction regions and at the new BTeV C0 interaction region of the Fermilab Tevatron. A new test facility was designed and operated, successfully testing 20 pairs of HTS power leads for the LHC and 2 pairs of HTS power leads for the BTeV experiment. This paper describes the design and operation of the cryogenics, process contro… more
Date: August 1, 2005
Creator: Rabehl, R.; Carcagno, R.; Feher, S.; Huang, Y.; Orris, D.; Pischalnikov, Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

[News Script: Coins]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: May 1, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Script
Partner: UNT Libraries Special Collections
open access

Fast Flux Test Facility (FFTF) Briefing Book 1 Summary

Description: This report documents the results of evaluations preformed during 1997 to determine what, if an, future role the Fast Flux Test Facility (FFTF) might have in support of the Department of Energy’s tritium productions strategy. An evaluation was also conducted to assess the potential for the FFTF to produce medical isotopes. No safety, environmental, or technical issues associated with producing 1.5 kilograms of tritium per year in the FFTF have been identified that would change the previous eval… more
Date: December 1, 1997
Creator: Apley, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Remote sensing for wind power potential: a prospector's handbook

Description: Remote sensing can aid in identifying and locating indicators of wind power potential from the terrestrial, marine, and atmospheric environments (i.e.: wind-deformed trees, white caps, and areas of thermal flux). It is not considered as a tool for determining wind power potential. A wide variety of remotely sensed evidence is described in terms of the scale at which evidence of wind power can be identified, and the appropriate remote sensors for finding such evidence. Remote sensing can be used… more
Date: February 1, 1983
Creator: Wade, J. E.; Maule, P. A.; Bodvarsson, G.; Rosenfeld, C. L.; Woolley, S. G. & McClenahan, M. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Five second helium neutral beam injection using argon-frost cryopumping techniques

Description: High power helium neutral beams for the heating of tokamak discharges can now be provided for 5 s by using argon cryopumping (of the helium gas) in the beamlines. A system has now been installed to deposit a layer of argon frost on the DIII-D neutral beam cryopanels, between tokamak injection pulses. The layer serves to trap helium on the cryopanels providing sufficient pumping speed for 5 s helium beam extraction. The argon frosting hardware is now present on two of four DIII-D neutral beamlin… more
Date: October 1, 1995
Creator: Phillips, J. C.; Kellman, D. H.; Hong, R.; Kim, J. & Laughon, G. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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